[DummyTron]

156.

To ensure that old ARP table entries do not become a serious problem, do network devices place a time-to-live on ARP entries?



157.

When using the ping utility, does a reply of five exclamation points mean that all five echo request packets are unable to reach their destination?



158.

Is the address 221.64.231.6 a Class D address (also known as a multicast address)?



159.

Is 192.168.23.0 the network identifier of a host that has IP address 192.168.23.45 with subnet mask 255.255.255.0?



160.

When network administrators create subnets, do they borrow bits from the original host field to make a set of subnetworks?